SU1218269A2 - Drying plant - Google Patents

Description

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The invention relates to a technique for drying bulk materials in a rotating drum, and can be applied in various industries and is an improvement to the invention by the author. No. 1109566.

The purpose of the invention is to increase the resource.

. Figure 1 shows a schematic representation of the proposed drying installation, a general view; FIG. 2 is a section A-A in FIG. fig.Z - node I in figure 1 (an enlarged scale).

The drying unit consists of a furnace 1, a rotating drum 2, a stationary annular collector 3 of the receiving sector 4, communicating through the nozzle 5 and the opening 6c of the internal cavity of the drum 2, the end wall 7, a screen 8 consisting of a ring 9 and a coil 10.

Drying installation works as follows.

The coolant from the furnace 1 enters the drying drum 2 at a speed of 5-10 m / s at 1400-1600 ° C. At the same time, a wet pasty material in the form of a continuous tape through the pipe 5 and the opening 6 enters

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into the inner cavity of the drum 2. Before entering the drum 2, the high-temperature coolant moving around the periphery cools5 with the coil 10 and is shielded by the ring 9 to prevent the drum 2 from burning in the area of the loading unit. Ring 9 also functions as a retaining ring to prevent material spillage.

Example. The drying of calcium borate is carried out in a drum-type dryer according to the conditions of the prototype. The heat carrier is flue gases with a temperature of 1400-1600 C. The overhaul mileage of the installation is 120-105 days. The stoppage occurs due to burning and warping of the entrance edge of the drying drum 2.

20 to a depth of 250-300 mm.

Example 2. The drying of calcium borate is carried out in a drum dryer in the presence of a screen 8. Coolant — flue gases

25 with a temperature of 1BOO-TVOO C. The overhaul mileage of the installation is 330 days. Burn and warping of the drum inlet edge is not observed.

A - A

FIG. 2

Editor S. Lisin

fig.Z

Compiled by A. Zheleznov

Tehred O. Netsecorrector T. Kolb

Order 1124/50 Circulation 635 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch PSh1 Patent, Uzhgorod, Proektna St., 4

Claims (1)

DRYING UNIT by ed. St. No. 1109566, characterized in that, in order to increase the resource, a screen is installed between the furnace and the drum in the form of a ring ~ attached to the drum in the area of the loading unit and a cooling coil passing through the opening of this ring into the furnace and into the drum and having the shape of a truncated cone, facing a large base towards the furnace.